mochixuan / react-native-zoom-view

scaling operations on view

react-native-zoom-view

已放弃，有点问题在和swiper交接滑动时

---

效果

• 实现图片放大缩小和完美兼容三方左右滑控件

安装

• yarn add react-native-zoom-view
• npm install react-native-zoom-view

单独实现缩放

import ViewControl from 'react-native-zoom-view'
const {width,height} = Dimensions.get('window')

<ViewControl
    cropWidth={width}     
    cropHeight={height}
    imageWidth={width}
    imageHeight={height}>
    <Image
	style={{
	    width:width,
	    height:height,
	    resizeMode: 'contain'
	}}
	source={{
	    uri:item
	}}/>
</ViewControl>

实现缩放和左右滑

实现缩放和左右滑
import Swiper from 'react-native-swiper'
import ViewControl from 'react-native-zoom-view'

renderSwiperItemView() {
const imgs = [
    'http://img1.ph.126.net/u1dVCkMgF8qSqqQLXlBFQg==/6631395420169075600.jpg',
    'http://img2.ph.126.net/PqPdn4nhTSXTlPfDE_igJg==/6631322852401020356.jpg',
    'http://img1.ph.126.net/Ta6-WaHwuYMSehnn6Xcmyg==/6631426206490316698.jpg',
    'http://img0.ph.126.net/bCkBoPHS4d32mUJPqBIYrQ==/6631803338979839988.jpg',
    'http://img2.ph.126.net/bkaOfRyDoyddXri0GjpWjA==/6630608169839463386.jpg',
];
return imgs.map((item,i)=>{
    return (
	<ViewControl
	    key={i}
	    cropWidth={width}
	    cropHeight={height}
	    imageWidth={width}
	    imageHeight={height}>
	    <Image
		style={{
		    width:width,
		    height:height,
		    resizeMode: 'contain'
		}}
		source={{
		    uri:item
		}}/>
	</ViewControl>
    )
})
}

render() {
return (
    <Swiper
	loop={false}
	showsPagination={false}>
	{this.renderSwiperItemView()}
    </Swiper>
);
}
    

文档

Props	Type	Description	DefaultValue
cropWidth(required)	number	operating area width	100
cropHeight(required)	number	operating area height	100
imageWidth(required)	number	picture width	100
imageHeight(required)	number	picture height	100
onClick	()=>void	onClick	()=>{}
panToMove	boolean	allow to move picture with one finger	true
pinchToZoom	boolean	allow scale with two fingers	true
leaveStayTime	number	how many milliseconds after the finger presses to trigger onClick	100
leaveDistance	number	how many finger movement can also trigger onClick	10
horizontalOuterRangeOffset	(offsetX?: number)=>void	horizontal beyond the distance, the parent to do picture switching, you can listen to this function. When this function is triggered, you can do the switch operation	()=>{}
onDragLeft	()=>void	trigger to switch to the left of the graph, the left sliding speed exceeds the threshold when triggered	()=>{}
responderRelease	(vx: number)=>void	let go but do not cancel	()=>{}
maxOverflow	number	maximum sliding threshold	100
longPressTime	number	long press threshold	800
onLongPress	()=>void	on longPress	()=> {}

Reference

• 图片放到缩小和属性名字都是来自react-native-image-zoom，只是修改了和添加了一些方法使其更加兼容左右滑。
• react-native-image-zoom